Wrench



No. 749,544. PATENTED JAN. 12, 1904.

w. H. ERMENTROUT.

WRENCH.

A PPLIOATION FILED SEPT. 23, 1903.

N0 MODEL.

UNITED STATES latented January 12, 1904.

PATENT OFFICE.

WRENCH.-

SPEGIFIGATION forming part of Letters Patent No. 749,544, dated January12, 1904.

Application filed September 23, 1903. Serial No. 174,280. (No model.)

' To all whom it may concern.-

Be it known that I, WILLIAM H. ERMEN- TROUT, a citizen of the UnitedStates, residing itself to the object to be operated upon or en- Theinvention is fully described in the following specification and clearlyillustrated in the accompanying drawings.

Figure 1 is a side View, Fig. 2 a plan View,

and Fig. 3 a longitudinal sectional View, of

my wrench.

1 is the operating-handle and is closed at its rear end by means of aremovable cap or plug 2, to which is formed a rod 3, which extendsthrough the said handle its entire length. The forward. end of thehandle is formed with a jaw 4, having angled inner faces 5 and 6, and

a toothed rack 7 is fdrmed along the under edge of the handle portion oneither side just behind the jaw. A sliding grip 8 fits loosely over thehandle and closes up the opening to the hollow handle, protecting itsoperating parts. This grip carries a wheel 9, mounted between lugs10,,at its front end. This wheel 9 is formed with peripheralserrationsaround its central and greatest diameter and has gearteeth 11cut into its smaller diameter on either side of the serrated portion.These teeth 11 engage the tooth-rack 7 of the handle. Aninwardly-extending lug 12 is formed on the grip 8 immediately behind thewheel 9, which lug engages and slides on the rod 3, said rod acting as aguide for the grip. A coiled spring 13 surrounds this rod 8 and restsagainst the cap or plug 2 at one end and the lug 12 at the other end.

When it is desired to engage an object with my wrench, the grip is drawnback along the handle, the spring 13 compressing itself and jaw placedabout the object. The grip is then released and the spring 13 willreturn it until the-serrated periphery of the wheel 9 engages saidobject. The object so engaged will be held securely and prevented fromslipping, as the wheel 9 cannot easily revolve, being held in positionby reason of the gearteeth and rack, together with the action of thespring.

The wheel 9 is removably mounted in its lugs and can be readily removed,if required, for repairs.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is

A wrench comprising a hollow handle, a removable plug closing the rearend thereof, a guide-rod formed on said plug and extending the entirelength of the handle, a jaw formed on the front end of said handle,toothed racks formed on the under side of said handleirnmediately behindsaid jaw, a sliding grip loosely mounted on said handle and closing thehandle-opening, a wheel having its larger diameter serrated peripherallyand its smaller diameter formed with gear-teeth removably mounted onsaid grip, an inwardly-extending lug formed on said grip and engagingsaid guide-rod, and a coiled spring mounted on said guide-rod.

In testimony whereof I have signed my name to this specification inpresence of two witnesses.

WILLIAM H. ERMENTROUT. Witnesses:

ED. A. KELP, GEO. M. MILLER.

